The glass plant in Okmulgee caught fire on Thursday and heavily damaged the business.
The company recycles glass bottles and is mostly a concrete building with a metal roof.
The fire chief said they are still investigating what caused the fire, but a few workers who went to lunch across the street, were the first ones to see the thick, black smoke.
He said the area most heavily damaged had about $150,000 worth of product inside, but firefighters kept the fire away from a section that had $650,000 worth of inventory.
Nobody was hurt.